flex 模块动态加载

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
			   xmlns:s="library://ns.adobe.com/flex/spark" 
			   xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600" initialize="application1_initializeHandler(event)">
	<s:layout>
		<s:BasicLayout/>
	</s:layout>
	<fx:Script>
		<![CDATA[
			import flash.utils.setTimeout;
			
			import mx.controls.Alert;
			import mx.core.IVisualElement;
			import mx.events.FlexEvent;
			import mx.events.ModuleEvent;
			import mx.modules.IModuleInfo;
			import mx.modules.ModuleManager;
			
			import spark.components.Button;
			private var mInfo:IModuleInfo=null;
			protected function application1_initializeHandler(event:FlexEvent):void
			{
				mInfo=ModuleManager.getModule("M.swf");
				mInfo.addEventListener(ModuleEvent.READY,modulReady);
				mInfo.addEventListener(ModuleEvent.ERROR,modulError);
				mInfo.addEventListener(ModuleEvent.PROGRESS,modulProgress);
				mInfo.load();
			}
			private function modulError(e:ModuleEvent):void{
				Alert.show('modulError');
			}
			private function modulProgress(e:ModuleEvent):void{
				log.text=e.bytesLoaded+'%'+e.bytesTotal;
			}
			private function modulReady(e:ModuleEvent):void{
				var moduleInfo:IModuleInfo = e.currentTarget as IModuleInfo;
				var b:IVisualElement=e.module.factory.create() as IVisualElement;
				g.addElement(b);
			}
		]]>
	</fx:Script>
	<fx:Declarations>
		<!-- 将非可视元素（例如服务、值对象）放在此处 -->
	</fx:Declarations>
	<s:Group width="500" height="500" id="g">
		<s:Label x="72" y="249" text="标签" width="313" id="log"/>
	</s:Group>
</s:Application>